STUDY OF ECM ANTENNA OPTIMIZATION.
Abstract
Plasma simulation equipment permitting measurements of plasma conditions, and effect on reentry ECM antennas is described. Preliminary measurement of plasma simulator operation is reported up to 50 amps with stable, full plasma generation in the region of 27 to 32 amps, pressures of .06 to .09 torr of pure Argon gas with estimated electron concentration of 10 to the 14th power cm-3 and collision frequencies of 10 to the 7th power sec-1. Calculation of collision frequencies and electron concentrations are shown for a slender, fast reentry vehicle, and a blunt-cone slower vehicle. These calculations are related to the simulator operation conditions. Base-line data on a log-periodic antenna to be used in the plasma simulator are included. The mathematical model of the plasma is discussed. A cone, tipped by a small sphere, is used as the model, the sphere being employed to make the mathematical solution more rapidly convergent. The equations to be solved and the boundary conditions are given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 17, 1966
- Accession Number
- AD0479766
Entities
People
- Edward Rolfe
Organizations
- RTX